LU-16518 lnet: remove want_large_primary in lnet_peer_merge_data()

LU-16518 lnet: remove want_large_primary in lnet_peer_merge_data()

This variable is not usused anywhere, so let's remove
it.

Fixes: 57bcd6aa7f5f ("LU-10391 lnet: lnet_peer_merge_data to understand large addr")
Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: If1f67280b15bb2cd37bd29b6731a7956a83e29ca
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58353
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>